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Switch PFCOUNT to LogLog-Beta algorithm.

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The new algorithm provides the same speed with a smaller error for
cardinalities in the range 0-100k. Before switching, the new and old
algorithm behavior was studied in details in the context of
issue #3677. You can find a few graphs and motivations there.
This commit is contained in:
antirez
2016-12-16 11:05:10 +01:00
parent 0224be8811
commit 87538cb7fe
4 changed files with 15 additions and 56 deletions
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src/server.c
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@ -1400,7 +1400,6 @@ void initServerConfig(void) {
server.lazyfree_lazy_eviction = CONFIG_DEFAULT_LAZYFREE_LAZY_EVICTION;
server.lazyfree_lazy_expire = CONFIG_DEFAULT_LAZYFREE_LAZY_EXPIRE;
server.lazyfree_lazy_server_del = CONFIG_DEFAULT_LAZYFREE_LAZY_SERVER_DEL;
server.hll_use_loglogbeta = CONFIG_DEFAULT_HLL_USE_LOGLOGBETA;
server.lruclock = getLRUClock();
resetServerSaveParams();